You might also try asking around your parish to see if there’s a rosary maker. If so, they might be able to repair the broken chain or they might be able to use the beads, medal and crucifix and re-“string” the beads into a new rosary.
It’s not impossible to fix them. I recently inherited a rosary blessed by John XXIII that was missing a crucifix and was broken. It took some searching but I was able to find replacement parts and repair the rosary.
If you want to see if you can repair it yourself, www.rosaryshop.com has nice instructions on how to make a rosary.