To my knowledge, Fox has never made shocks specific to a 250R. Fox is into mass production, nothing custom about their operation, guess they see no demand for a quad that was only produced for four years over 25 years ago. If you see a Fox shock on a 250R, it was because is was cross referenced with another brand that Fox does produce a shock for and found to work. I have only seen 450R fronts used on a 250R, I have never seen a Fox rear shock on a 250R.
Guess they see a market for the Banshee shock, looks like it is the same shock for 19 model years worth, that is a lot of Banshee's.
Doug