You can buy new replacement drums for the Huck brakes on the 3100. You can also buy the shoes new. Now you may be able to buy new fasteners, those are called pin locks and they look like bent washers. I would be very careful with those in case you can't find new ones. there are springs on those pins and I don't know whether the springs or the pins are available new anywhere. They can fly out of sight if things slip when mounting them. The cylinders are all available new or they can be rebuilt. Lots of brake specialists can put a stainless steel sleeve inside. I have heard some complaints about the new non asbestos brake shoes but I find they work really well.
