Pennswood made a 8.5 with a 15" wheelbase for Northern Co a couple seasons back. I just measured mine and it was 32.5" tip to tip(33" measuring with nose/tail steepness). It had a tie-die stain and a red top ply:
I asked in the woodshop thread and Pennswood directly if they made the shape for any other companies and haven't gotten any leads as to other companies that use the shape. I believe Bacon makes a similar shape(15" wheelbase not sure about overall length) and Flip used to have an Arto 8.5 with a 15" wheelbase but not sure what their deal is anymore. Also Antihero had an Albino guest deck whose dimensions were 8.43"x33" with a 15" wheelbase(not sure that really works for you). Many folks on here have asked a similar question and I think it's just really tough to find a deck with those dimensions. Let us know if you find anything that works as once my Northern Co wears out I'm not sure what my next deck will be.