If you damaged your screen or would just like to have a spare around this is the replacement screen for the USFS approved spark arrestor TRS-1.
Part# RP-S-30 Technical Data:
PATENT PENDING & USFS APPROVED (REF. FILE#0880-03)
USFS approved replacement screen for TRS-1
Screen-stainless steel
Weight- 3grams/0.1oz