So i've narrowed it down to two options, but none of them are even close to 7 inches in length. I understand the inlet portion could be trimmed, but It seems to me like there isn't enough length on the inlet portion of the tips to cut 3 inches or so.
These are 10.25 in length
These are 11.5 inches. I like that the outlets are slightly slanted to flow with the bumpers (similar to cyba's)