NevenM - I found a 911.110.225.01 and an .02 in my PET. No Bosch #s though so I couldn't tell if they were the same.
I'm thinking I 'll just get new ones. Mine are probably 23 years old and if Tom F2 is correct then they certainly should be worn out... <$200 is relatively cheap
Blau - I do not have a place in mind that refurbs but have head of places that match injectors. But, it may be that these places are geared more toward the EFI types then our CIS mechanical styles.
-Michael
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Michael 
'82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah
'13 Cayenne GTS