ISO shop that can replace AR barrel for decent price

Don't have a bench/vise/block and have 6.5g barrel I want to swap out for 5.56. Hoping to keep it cheaper, understanding I'll have to pay an armorer's minimum time.

Also if anyone wants a 6.5 grendel 18" spr barrel/bolt for a build/conversion, I'd be happy to trade for any 5.56 barrel/bolt.