The RUU for the HTC Thunderbolt/Mecha/Incredible HD, for your downloading pleasure.....Thanks to 911sniper.
Get it here
It's the top link....Name: RUU_Mecha_VERIZON_WWE_1.03.605.10_Radio_1.02.00.01 03_2r_NV_8k_1.37_9k_1.52_release_165253_signed.exe
NOTE: This link is extremely slow at the moment. I'm trying to get a mirror.