G80-11900
SP 6x bars
Unfortunately, these won't fit the CM Storm QF Pro, Razer BW, iOne etc. that have the stem in the centre.
Signature Plastics' DCS-profile 6-unit space bar fits only some keyboards from Cherry that have the stem offset from the centre: the G80-11900 but also variants of G80-1800 and G80-11800 that have Windows keys. There are also some keyboards in Cherry's G81 series that have these space bars also.
I don't know about 6-unit DSA or SA profile though...