For a T-5 almost any of the bell housings will work. The SR-4/T-4/5 all bolt up the same. It is the T-176 that is harder to find since that is the same bolt up as the Ford T-18.
But if you look closely it seems that there are small indentations where the bell housing should be drilled for the Ford, T-176 pattern, if they are not already done so.
Also another good alternative is a Lakewood Scatter Shield. They are made in SFI race Spec and non SFI at a lower cost. Very nice and easy to use bell housings.
If you cannot find one, I might have one out back but would need to go digging. Most of mine were already made for the T-176.
Carl