I had one bumper rechromed lately. A good chrome job is about 1k, including some straightening.
My bumpers were chromed someday in the past by the PO in the US. Chrome was peeling in some areas, grinding marks still visible. Bad (cheap?) work.
I checked this 914 with stainless steel bumpers which is for sale in my area.
Note that the "shine" of stainless is different to chrome. More on the "dark" side. Fit seems to be correct, though.
An option, nevertheless.