Una Voce Orange County has or at least had a very active chapter. I think the indult crowd moved from St. Mary's by the Sea in Huntington Beach to the remaining indult at San Juan Capistrano or Our Lady Help of Christians.
Angelus Press and the FSSP website have new Traditional missals for sale. They both are supposed to be good (I haven't seen either). Fr. Lasance's missal and the St. Andrew's missal are commonly used older missals. AP, FSSP and probably TAN books and Catholic Treasures all sell missals.