Thanks for participating on askgovacuum. Unfortunately this filter will not fit your model, and as of today there is no generic replacement filter available for this model.
Unfortunately it seems that you will need to purchase the Genuine NSS Filter, which we can special order for you, but as you mentioned, it's a very costly filter. We can order the NSS BP30 Filter NSS Part Number 6296491 for $345 free shipping.
I'm sorry I couldn't come up with a cheaper solution for you, if you'd like to go ahead and order this filter, please feel free to contact us.