resistances where to get boosters

[Crystalion]

As for buget resist gear, look for a 4 socket armor of some kind.  Fill it with ral/ort/tal/thul to taste.  you can easily create a +30 all resists armor this way.  The same goes for helms.  If you are lucky, you can end up with a druid pelt with bonuses to a skill you use, as well as good resists.  Gambling rings/ammys/circlets/boots/gloves can yeild some decent resist gear as well.

At clvl 69 with crummy resists one might assume your ammy/rings are soso and cubing new ones might make sense...

Every 3 junk rings, cube into a new ammy (blue aka magic only). Ditto for junk ammys to ring.

Alternately you can directly cube high individual resist rings and a high resist all ammy ala:

6 Perfect Gems (1 of each type) + 1 Amulet (any quality) = Prismatic Amulet
Use this formula to create an Amulet with Resistance to all. ilvl = 50. The amulet will always have the Prismatic prefix (All Resistancs +16-20) and has a chance at getting a suffix as well.
1 Magic Ring + 1 Perfect Emerald + 1 Antidote Potion = 1 Jade Ring
Use this formula to create a Poison Resistance Ring. The Jade Ring has a random percentage (21-30%) of Poison Resistance. You may also receive an additional Magic Suffix. ilvl=30.
1 Magic Ring + 1 Perfect Ruby + 1 Exploding Potion = 1 Garnet Ring
Use this formula to create a Fire Resistance Ring. The Garnet Ring has a random percentage (21-30%) of Fire Resistance. You may also receive an additional Magic Suffix. ilvl=30.
1 Magic Ring + 1 Perfect Topaz + 1 Rejuvenation Potion = 1 Coral Ring
Use this formula to create a Lightning Resistance Ring. The Coral Ring has a random percentage (21-30%) of Lightning Resistance. You may also receive an additional Magic Suffix. ilvl=30.
1 Magic Ring + 1 Perfect Sapphire + 1 Thawing Potion = 1 Cobalt Ring
Use this formula to create a Cold Resistance Ring. The Cobalt Ring has a random percentage (21-30%) of Cold Resistance. You may also receive an additional Magic Suffix. ilvl=30.

From nightmare act 3 on (including nm cows) you can save Grand Charms to reroll (charm plus any 3 perf gems) to try to get +1 skill tree... you'll "accidentally" come up with ~27% single resist charms that way.

Don't forget that antidote and thawing potions are cheap and give you half a minute (iirc) of +50% resist poison and cold (respectively). Because of this, and LEBs and Inferno/Firewall/Meteor monsters I tend to focus on resists in the following order: Lightning, MDR, Fire, Cold, Poison, other (if I played a lot of melee builds I'd no doubt put physical resist on the list before "other").

Gambling for boots/belt/gloves rares with resists occasionally nets some great ones... I've had some with over 80% total net resist (triples). Since you can gamble for these on low base items when you are in your 20s there really is no reason for hopeless resists as advanced as you are.

Good Luck.