The alloy mushroom and rubber gromet for mounting is 580 Yen X 4 (no bolts) new. The blanking gromit is finished that fills in the front ones that were used on the H1 so you might want to consider 6 of the mounts and just put a big flat washer and nut at the back - it's what I done.
First set I have seen with all the fixing points still intact including the front one for the bellypan
They will clean up better than this - I have only given them a quick wipe.