Need thermoquad and air cleaner for 71 Demon

There is a 4973 TQ on Ebay for $189.00, been watching it being relisted for nearly two months just cant push the buy it now button. It will need a rebuild. Demon Sizzler list one on his site for $245 plus rebuild but I could not get him to reply to my email. I think I will do the same as dusterodon suggested and go with the 72 model carb for my 71 demon, as I don't have the matching #s engine. I saw one of the air cleaners go close to 400 on ebay for the 71's