Hi Doc,
Try looking for 3mm and 2.5mm brass rods from your local hardware store... Bushings are proprietary to Victorinox... Try not to damage them during drilling...
I also see in another thread that you wanted to swap blades, you will need to swap both OH Blade and backspring to your existing linerlock as the pivot end on the backspring (the part where the blade rests) is shaped differently... I think this has something to do with non-OH blades having half stops...
Sent from my iPhone using Tapatalk