Help finding a tremolo are grub screw

[Rock Candy]

Hello ya'll new to this forum. Just bought my third PRS. First two lost in a divorse about 6 yrs ago. Just bought the silver sky se second hand from facebook garage sale page and realized a coulple days later that the grub screw that holds the tremelo arm in is missing I got a hold of the original owner (no clue that it was even gone) so tried to order after market online, doestn fit. Any suggestions or advice on how to find a replacement? thx

 

[sergiodeblanc]

I’d contact customer service, pretty sure they’ll help.