You can print this instead of using the 3is shifter. it allows you to use whatever shift boot cover you want. You will need a shifter retainer/collar to keep the shift boot from sliding down. You may need to adjust the size depending on how wide you cut your hole and make sure you round off your corners.. i had to adjust the file by 3% for a snug fit with the shift boot over it. PLA will hold for a while but will eventually warp. For long term use print in a filament for high heat

My printer settings:

• Filament: PLA / reprinted in PETG-RCF
• Infill: 50%

Printed on Elegoo Neptune 4 Plus