Good question, this product is going to be hard to find. I imagine Ebay is going to be your best bet. Amazon does sell a 36″ bar for stihl chainsaws, but 075 was not listed in the product description. I would do the following: contact the manufacturer directly (which you might have already done) and if that doesn’t work, set up an Ebay alert so you receive an email when someone lists this type of chainsaw bar for sale.

Oregon Guide Bar