Armrest Recommendations?

I plan to use this drum to make a banjo uke, and I'd like to have a chrome armrest on it. This will be a cheap build, so I don't need a fancy $100 rest. I'll need something that will screw onto the flat side. Any suggestions?

https://smile.amazon.com/gp/product/B0002F7KGK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

I have this tailpiece that I never used, and I think that will work on this drum.

https://www.cbgitty.com/cigar-box-guitar-parts/gold-mandolin-cigar-box-guitar-tailpiece/

Any comments or suggestions will be greatly appreciated.

There are no ten inch armrests that I know of. 11 inch are available but are the wrong diameter and would be difficult to attach as the drum has no hardware. On a drum like that with no tension hoop to get In the way and no hard edges you won't need an armrest inmho

Thanks for that. You've saved me a lot of time. I can live without an armrest.