Starter ring gear

Hello, This is my first post here and I was referred here by a friend. I am in the process of restoring a 1928 Waukesha XA engine and was wanting to know if anyone has any information on ring gear size and availabilty for this engine. The engine has the cover plate for the starter, with an SAE #1 flange pattern but I have no ring gear. the flywheel looks like there is a step to shrink one on but I can't seen to locate what I need. I was told some early IHC trucks came with this engine. Thanks in advance for any help on this.

Its been a while with no response so I'll comment. Measure your flywheel step and call different places that sell ring gears. Google ring gear. Rock auto sells them and lists the dimensions. Jim

Jim, use the E-mail function, he has not been on since the day after he posted this.
Lloyd Admin