I have two front suspension shocks from two MTBs onto which I have installed rigids and have no plans to go back. A 2003 Rock Shox Judy which came on my Giant Rainier, and a Suntour SR XC60, 75mm which came on my Raleigh M50DX. The Judy needs a rebuild, but there's a guy here in town who does that and charges only something like $50. The Suntour SR XC60, 75mm was never used and has been sitting in my garage for three years, but seems to work fine when I compress it. Both I believe will support V-brakes.
PM me if interested. runswimcycle has first dibbs. I'll pay it forward with the Judy (just pay shipping) so I'm not breaking rules by selling in a non-selling area of the site.