Of those cars whereabouts whispered about over the past few months -
#06R is still with David Clark, confirmed to me again by him today
#07R is still in the UK [so far]
#11R is still in Italy last I heard
#16R's new location is not known to me as yet
#19R should be stateside by now
#21R was seen at Bahrains International Circuit
#25R is still with MSO
#27R is still in the UK