I finally managed to complete my set of MPHs so the following are free to anyone that needs them:
1953 51, 52
1954 65, 69 (photocopies not originals)
1961 151
1982 398
1983 419
1986 448, 449, 451, 453, 454
1987 457, 459
1989 486, 487, 488, 489, 490, 491
1990 494
1995 556, 557, 559, 560, 561
1996 564, 566, 567, 568, 570, 571, 575
1997 576, 579, 580
1998 599
1999 600
2014 785
1953 51, 52
1954 65, 69 (photocopies not originals)
1961 151
1982 398
1983 419
1986 448, 449, 451, 453, 454
1987 457, 459
1989 486, 487, 488, 489, 490, 491
1990 494
1995 556, 557, 559, 560, 561
1996 564, 566, 567, 568, 570, 571, 575
1997 576, 579, 580
1998 599
1999 600
2014 785