Upgrading Memory on a VAXstation 3100 Model 38

I recently acquired a bunch of MS42 memory options boards (several 4MB, one 8MB and one 12MB). The 12MB one could be used to take my machine from 20MB to the full complement of 32MB. The trouble is that the mounting posts used when you only have one memory option board foul the second memory option board, the manual tells me to break the old posts off, but I don't want to do any physical damage to the machine (would prefer to stick to 20MB if I have to). Is it possible to get the mounting posts out without breaking them? Or, does anyone have any spare ones? Ideally I also need the E clips to keep the two memory options boards properly spaced, I suspect I can survive without them, but if anyone has any of these going spare I'd be interested in some. Regards Rob