Yes I bought a cheap one on ebay for 30GBP or so IIRC.
I posted a pic (back in my blue Fokker D.III build I think). Not at home just now to post another.
It's not stereoscopic so quite awkward to paint, say a face with varying depth of field, under it, (although flat is fine) - magnification and lighting are terrific. I find it invaluable though to check say an instrument panel after work. Also to read decals like the WNW ones, before and during application, where my eyes are just not up deciphering the "Benzin" etc writing the right way up.
USB charging, so it just sits on a shelf behind me and goes on the bench whenever I need the extra mag the optivisor can't give.
Sandy