Help IDing Air Cleaner back plate for '73 FX

[clanky]

Hello.....I'm trying to ID the correct air cleaner back plate for my '73 FX resto project, Harley part# 29020-71, same as 1971 to early '75 FL/FLH and 1971 to '76 FX. If you still have your stock air cleaner could you please let me know which in the photo it is, 1, 2 or 3? I don't think it could be #3, but I am not for certain so for that matter it might be one different that what I show, I snatched these photos on eBay trying to find a variety. Thanks much for any help.

[Rubone]

#2. #1 is for a Tillotson, #3 for a Keihin and has the vent tube.

[clanky]

Thanks for the response, Robbie. Would you, or anyone else, have a part number 29020-71 back plate that fits 1971 to early '75 FL/FLH and 1971 to '76 FX that you could take a photo of? Or maybe a photo of the one on your bike? Trying to track down the correct part down and not sure what the heck the thing looks like. I'll be using a stock Bendix carb. Thanks much.