I've been using the Cadence VA 1 HP with my Avitas for the past 13 years with no complaints, and no felt inclination to replace/upgrade either of them. You could try putting up an ad in the 'Wanted' section for a used VA 1, as they do come up from time to time. Alternatively, check with the Cadence factory at Pune, as they also can put you on to a potential seller.