I see people have filled the with polyurethane filler etc
If you were making this as a new bush it probably would work, you could even choose your own shore value for the material -but that would need everything off the car to make it. I wouldn't think filler in and around the existing goosed bush would last.
The 16mm bolts just bind up with alloy corrosion dust in the thread - I managed to snap 3 out of 4 on mine
I was super careful with the 3rd one, it started winding out OK, as soon as it started to tighten up I wound it back in for it to start binding in that direction too. Ended up with less and less thread travel until it was stuck solid.
The new bolts (Febi 39231 are all 3 per side, only £5 on ebay) have been lathered in copper grease in the hope that it will leave little or no space for corrosion - I don't like this as it changes the torque value, I have just tightened to the given torque but not angle tightened.
If you don't have the patience or ability to drill out the sheared bolts, the good news is side suframes are currently only £15 to £20 each on ebay - if you are paranoid you could invest in a set ready to go on, if you don't use them sell them on
Fitted powerflex console last year. I now have a pair of oem consoles and floflex bushes to fit this week
I have experienced premature failure with powerflex stuff in the past, is that the case for replacement?
I hope floflex are the solution for you - but all the reviews I have seen of their products are not good