-- truly sorry to read here about your bad fortune.
I don't have hard data for 1995 (or 1996, and I've looked far and wide for them), but the actual figure for 1994 was posted on the CF by @FleetwoodAddict here:
1994 Cadillac Fleetwood Production Numbers 27,473 Total 17,794 Brougham Package 9,679 Base Options: A23: Solar Reflective Windshield / 4567 B05: Armored Body Equipment / 5 B18: Brougham Package / 17794 B9Q: Hearse Conversion / 736 CB5: Vinyl Covered Padded Roof / 16081 CF5: Astroroof Sunroof /...
In 1994, a mere 713 Fleetwood/FWB came with the V4P Trailering Package with 3.42 axle, out of 27,473 produced. That is less than 3%.
Note that an additional 904 FW/FWB came equipped with the (less desirable, IMHO) V92 package with 2.93 axle in 1994. The total with either TP was thus 1,617/27,473 = 5.9%.
PS: I doubt that the numbers are much higher for 1995, as the info for 1993 shows 2,505 FW/FWB (out of a total of 31,777 produced) had the V4P package. AFAIK, there was no V92 package for 1993 (mentioning this just in case your adjuster mentions the 2,505 figures). So that's 6.9% of the 1993s with the TP. See here:
1993 Cadillac Fleetwood Production Numbers 31777 Total 22105 Brougham Package 9672 Base Options: B05: Armored Body Equipment / 18 B18: Brougham Package / 22105 B9Q: Hearse Conversion / 375 CB5: Vinyl Covered Padded Roof / 24381 CF5: Astroroof Sunroof / 1642 DD8: Electrochromic rearview mirror /...