Those 2 pins have slightly different dimensions; see
viewtopic.php?f=98&t=72201 and it's important that the threads fully engage and the "tip" of each pin fully seat in the appropiate hole in each cam shaft. Hence I'm not at all sure I'd recommend saving the few bucks by trying to use 2 1052s. Might work just fine but if not it gets expensive.
In all honesty if you want to save the $s and have access to any sort of grinder (bench grinder or drill press with files) you might be better off making your own pins based on the posted dimensions. You can pull one of the cam pin hole plugs to get the thread size/pitch and purchase 2 bolts at your local hardware for probably under $1.00; cut them to length and then grind the tips as need be. The bee farms post shows grinding most of the threads off but I don't think that's needed although it does reduce the amount of "screwing in" one needs to do. I think correct length and full tip engagement are more critical and the way the tools are set full tip engagement is when the head of the tool is flush with the engine head hence why I think length is important.