Hi Guys - alive and well in China. Yes it is a holiday week and I haven't been on the Barn in awhile. Thanks for pursuing.
Gary - Denny and I did a lot of investigation on these bumpers about 4 years ago [I have been in China for 3 years]. I am "racking" my brain to remember what we finally determined, but for a quick reply I seem to recall, based upon parts that were on his fairly original 1931 Delivery, that there was a Phaeton door bumper that was pretty close to the A-81144 round bumper. The A-132490 right angle bumper was something we talked about possibly having extruded. Denny had a similar piece from somewhere else that he modified for the 1930 Delivery he last did.
I am headed back to the U.S. in the beginning of April. Stay in touch and I will check my old files and parts when I return.
BTW - Ken Ehrenhofer did a 130B Delivery restoration and may have some information.