They (the Ordinary Form in Latin) are really rare. Sure, there are parishes with them, but not many. I almost wonder if Summorum Pontificum actually had a negative impact on the availability of parishes offering the OF in Latin where OF in Latin-goers drifted by and large to the EF after the moto proprio as the number of options for EF location grew . In other words, I would not be surprised at all if the number of Masses offered as OF in Latin are more than just noticeably lower now than in 2007.
The competition between the two Forms ( this includes other things like breviaries, etc) is really unfortunate and I am sure not at all what Pope Benedict had in mind when it came to the idea of mutual enrichment. If anything, EF folks should be more supportive of the OF in Latin…so many people I know who pray the Mass in the EF have exposure to the OF in Latin to thank for their eventual draw to the EF. Just take a look at St John Cantius in Chicago or Saint Agnes in Saint Paul, to name just two places. Just beautiful. …EF and OF.