are you looking for it to flow side to side or up and down?
If you want up and down, get a bunch of Saab cores and weld them up, they are made by blackstone and are quality. If you want side to side get 2 SRT-4 or PT cruiser units. The pt cruiser ones are shorter but have one extra row.
If you're looking for something that looks good and performs, give turbonetics a call.