Are you looking for Ohmite resistors cross? Especially their precision wirewound product line? check our cross ref list:
| Ohmite / Ulltronix | Riedon |
| 101A | SM-4 |
| 102P | SM-8 |
| 103A | SM-13 |
| 104P | SM-9 |
| 122A | SM-2 |
| 123A | SM-3 |
| 12F | MT-2A |
| 13F | MT-2B |
| 15F | MT-5 |
| 184A | SM-15 |
| 185A | SM-12 |
| 203A | 100 |
| 203PA | 131PC |
| 204PA | 101PC |
| 205A | 101 |
| 207A | 102 |