If you do not find what you need with Batton's, try Mac's.
http://www.parts123.com/parts123/yb.dll ... e~cadeffcD
I would give you the exact link but their site desing makes it impossible to. Go to the above link, then select "Early V8" from the Make pulldown. Choose "Steering" from the Category pulldown menu. Click the "Go" option next to the "Category" pulldown.
You will then see search results that you can page through.
The prewar Gemmers are a different animal than the postwar Gemmers. If you get into the deep stuff and need new worm gears, two or three tooth steering sector shafts, etc, you may have to call on one vendor or another.
Here is a very helpful email I got from club member Bjorn Bakken, as he tried to find parts for his 1940 17-ft Deluxe. We shared much of the same issues. I helped him on a couple of issues, and he has helped me in return, in getting to the bottom of the exact origin of our pre war Gemmers.
You have seen my reply to the steering wheel question on the Buzz. Here is my "documentation" to why I'm pretty sure our steering gear is the same as the '32-'34 Ford V8's.
I have attached the picture of my worm gear, stamped with "13", and the picture of the 13:1 ratio worm gear for RH steering in Mac's catalog. Though I have not ordered this, they appear to be identical.
I have both the gasket set, and adjusting kit, and they are 100% identical to the original.
Also, the diameter is of the steering rod/shaft is the same as Ford V8's, 0.760". Model A rods/shafts are 0.880" (+-)
CC may have been using the same as Mod. A's earlier though.
What we both have found, is that many have referred to the pre war gears as Model A gears. This is likely true of the earlier gears, but by 1940, the ones used in the barrel designs were in fact Ford Early V8 truck gears.
There are a number of differences to these gears, internally and externally. Most notably, some have a two-tooth splined sector shaft, and others used a three tooth design. This will affect the worm needed.
I am sorry to say, I am less familiar with post war Gemmmers, but I am pretty sure they will be easier to get parts for, including seal kits.