44mm Velocity Stacks

I want stacks so bad! For the life of me I cant find a quality resource for them sized in 44-45 mm. These smoothbores are a royal pain to find filters for.
Thanks
Craig

I am running 1986 gsxr k&n on my 29mm smoothbores. The filters are a touch too big but fit well enough with no gaps.Acutally you could fit a rubber tube over the carb and then fit the fitler on top of that. The 86 gsxr filters are plentiful and fairly cheap. Also i too have been wanting stacks but good luck finding those!