In 1992 I owned 2 pair of the 301 Continentals, and there were differences just besides the cool laminated wood and an extended bass port. They did have a slightly higher power handling then the normal 301s and had a deeper bass response and if inremeber correctly the woofer was a tad beefier. I...
Look on Mouser, they have drop down menus with the values of your relay. Plug in the values and it will generate a results page with suitable replacements.