WTB - waist level viewfinder for Exa 1 camera

This isn't strictly Pentax other than it will allow use of my Takumars on another camera body. I've recently acquired an Exa 1C camera but it came with the eye-level viewfinder rather than the waist-level finder I wanted. Does anyone have a waist-level finder for this camera?

I'm pretty sure they're universal for all these Exas (1A, 1B, 1C).

Many thanks

Any good?

https://www.ebay.co.uk/itm/165908014766?hash=item26a0e366ae:g:cVYAAOSwDpFi-0ex&a...