If your handy with a welder you could look at places like Craigslist for exhaust tube take offs and cut out the bends and weld up your own or place an ad for old exhaust tubing and do it. If you prefer to pay, auto zone carries prebent pieces but their not true bent tubes their crimped pieces. I always keep the bends off exhaust pipes the buddies just toss for scrap cause I prefer to build my own even if it means buying some straight tube n welding in bends off the take offs. I also agree if the shop can't do bends id say go somewhere else. Any exhaust shop that's worth anything can bend tube to fabricate exhaust.