who in SoCal does Av Receiver and Amp upgrades?

I wanted to get some upgrades done to my Marantz Receiver and Outlaw 7500 amp as well as possibly changing out a few bad caps. both items are easily over 10 years old so might need to replace a few items to bring them back into factory spec. anyone have recommendations for places in Southern Cali?

I emailed a few places that do amp repairs but id like some opinions on here. some of the places are closed and some arent taking orders for awhile. I would rather not have to ship anything out of state especially my Outlaw 7500 amp since it weighs around 80lbs and dont really trust any shipping company to handle it.

not looking to do too many upgrades just upgrade the inlets to furutech FI-06 NCF add bybee filters on them, possibly upgrade some of the caps and resistors. Thanks.