Parts can usually be made locally. Search for 3D printing (my city). It should turn up a list of local printers. Prices may range from low 10’s to close to 100’s depending on the size and materials used.
3D CAD files for Target Holder
Club Target Holder
Value engineered solution for clubs. Basic target holder that lets you have multiple lanes without breaking the bank
Competition and Home Target Holder
Full features with witness paper driver and LED illuminations. Build with and without the witness paper drive as needed
AutoDesk Fusion 360 CAD file. Unzip to use