problem finding '82 440 rubber diaphragms

I'm slowly working, cleaning, replacing parts on my " new to me" '82 kz 440 LTD belt. One of the rubber diaphragms is torn. And searched ebay, only found one source of them, but they are located in the UK. And then I found Patzilla.com has them, BUT after checking and double checking the OEM # 16126-1044. Partzilla is selling them for $261.35!!! EACH!! thats not the whole carb.  Is there a better source for these parts?  I thank anyone for some info. 

JBM Industries Rubber Carburetor Boot Socket Holders & Diaphragms    Pretty sure your 440 takes the same as my 750LTD   K-71 diaphragms

I bought 6 of those JBM diaphrams for my 750R1 carbs and for my '80 XS650SG. Same BS34 carb bodies. Easy peasy to instal. I've put many a mile on the XS carbs with them and no problems.