Need beater for vintage Liisa

I recently purchased a new to me Toika Liisa. It belonged  the seller's MIL originally and the seller had it for a number of years. She told me MIL purchased it in the early 80s in Germany. It was disassembled and I was able to get a copy of the manual. I haven't had a chance to put it together, but on closer inspection I don't think I have the beater. I've already reached out to Toika and Webs about getting additional parts (it is missing a shaft which the seller disclosed). Does anyone know where I can get a beater? Will I have to have someone make one? I know some woodworkers, but I doubt I can get birch wood. The seller has moved out of the country so I cannot contact them. Any help is appreciated.

 

Elaine