~13 gal. Varible capacity Tanks

[Doc]

I have seen 13 gal. variable capacity stainless steel tanks for sale. I would rather have one or two that are clear, or at least translucent, glass or plastic. That way I can see the wine clearing and the depth of the lees. Does anyone know if such an animal exists? Also, is there a cold stabilizing jacket that can fit this small of tank? Any help would be appreciated.

Thanks,
Doc