Thanks again to everybody for their words of wisdom.
JackD201 - I did speak to Noel in Manila. Great guy but sadly he was unable to help as they don't sell the 5A's nor do they carry any parts etc.
So after due consideration my plan is get a quote on exactly what it would cost to send the entire speakers to the US (and back!). If prohibitive I will need to plead with Richard Vandersteen to take only the drivers and crossovers for analysis and repair or replacement.
Once I get everything settled I shall post again just to complete the circle.
Thanks again all...great forum and great advice.....99/100. I would have given a perfect 100 but nobody has yet offered to adopt my kids!

Cheers