^ The San Marco Concor Racing Open might also fit the bill, maybe? Fairly classic domed profile, 134mm wide, with cutout.
http://www.sellesanmarco.it/imgDettaglioGrande/user_images/prodotti/012/COLLEZIONE/01_CONCOR/279L007_CONCOR-RACING-ARHEAD_SIDE.jpg
http://www.sellesanmarco.it/imgDettaglioGrande/user_images/prodotti/012/COLLEZIONE/01_CONCOR/279L007_CONCOR-RACING-ARHEAD_TOP.jpg
@Regal started
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^ The San Marco Concor Racing Open might also fit the bill, maybe? Fairly classic domed profile, 134mm wide, with cutout.
http://www.sellesanmarco.it/imgDettaglioGrande/user_images/prodotti/012/COLLEZIONE/01_CONCOR/279L007_CONCOR-RACING-ARHEAD_SIDE.jpg
http://www.sellesanmarco.it/imgDettaglioGrande/user_images/prodotti/012/COLLEZIONE/01_CONCOR/279L007_CONCOR-RACING-ARHEAD_TOP.jpg