Our used machine came with a cut strip feeder block that was 3D printed by previous owner, but after using it for a couple of times we struck on a better solution. We covered a piece of wood with double-stick carpet tape. We also used double stick tape to attach the block to the machine.
The tape is perfect for attaching parts, and when it is time to advance the strip the parts tape can just be pulled up and re-positioned on the wood block. An added bonus is that there is no wasted space for the "channels" in the old system, although it is important to keep strips lined up on a grid on the machine. This hack has worked out very well for feeding various parts on the machine, mostly parts that prove troublesome to feed properly - or when we run out of feeder space.