Man, is this a chronic problem
I went through the same drill last weekend, second switch in 2 years/10,000 miles! The last time was done by my Indy for an exorbitant 3 hours of labor going in through the dash top ("we dont get under, or we'll have a workman's comp case"). I removed the seat and that made it doable from underneath (with a jewlers screwdriver hacksaw shortened). And of course I found I needed to order torx female sockets to get the seat off (a 3/8" 12 point is close, but was starting to round the seat bolts).