Here's how I tackled this. I replaced 2 of the broken plastic pieces with 6-32 threaded aluminum standoffs and reinforced the 2 remaining with non-threaded aluminum standoffs. The non- threaded ones just snuggly slip over the remaining pieces and the threaded ones I used J-B Weld. Holding up so far. I also used J-B Weld to attach washers to reinforce the 4 mounting holes that hold the bezel in the dash because they were getting cracked and brittle. All these standoffs came from ACE hardware in their fastener bins.
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