There is. You can use the msa-converter by Zorg, a member here. You can create msa's from zip-files. Don't have the link to his homepage, but you can search the forum.
TI 99/4A, C64, 800XL, 260ST, 520ST, 520ST+, 1040ST, 1040 STE, Mega ST1, Mega ST2, Mega STe, Apple IIsi