Which old larger 10" Advent woofers will fit the 5002 model?

[Fritz]

deckeda wrote:
I'd be similarly cautious about swapping in any non-identical tweeter. Concentrate on original and used for these Advents, not something that just fits in the cabinet. That's a waste of time and money, unless all you care about is the "look" of the thing. As it is, some low-cost modern speakers will improve upon these classics in some key areas.

As for the crossover, you can build those yourself with a soldering iron and the individual replacement caps and resistors and actually create a better (more accurate) one than the original.

most definitely.
and them old crossovers probably have dried out caps as well.