R12 Supplier Form and pre-existing attachment categories

 We are actively engaged in migrating from 11.5.10 to 12.1.3.  It was recently discovered in SIT testing that our 11i Supplier attachment categories were not visible on the R12 Supplier form.  Data for these attachments is still present in the R12 database and prints successfully on our custom purchase order.  MetaLink documentation seems to state that the only category attachments supported on the Supplier form in R12 are "From Supplier", "To Supplier", "To Receiving", and "Miscellaneous".  Is there a solution for presenting pre-existing 11i Supplier attachment categories in R12?