Actually have a 84 C30 that i have swapped to 1990 Suburban doors and power mirrors. Old doors had the tripod setup on it. Rather not drill into these doors to mount some. Been looking at other setups and nothing specific to the 1990 Suburbans. Any ideas on what would replace the current mirrors? Any later model extendable stuff fit. All look to have the basic 3 bolt mounting bolts.