Does anybody know a good source for the 190E seat back web/net holders?

The webs are good, I found a source for the elastic, but the plastic U shaped holders are broken. Mercedes wants something like $60 for them?!?!

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)