Clearly many points here, no automotive manufacturer wants to supply spare parts other than service items - it's very costly to have stock of parts being kept warm and not knowing if they will be needed or not. Suzuki are now introducing a spares inventory for their 'classic' models as they have seen that end of the market supporting the bikes is now very rpofitable, but this is bikes over 20 years old that sold in masses.
The 961 and other classic styled bikes have no problem is selling, it makes sense to produce the 961, but the price charged in the past was too high. This day and age similar bikes are a lot less and made outside the UK and US. A new 961 would need to be considerably cheaper than it was under Garners reign, the competition against the 961 has improved and cheaper.
Reliability - should not be an issue with TVS at the helm, they produced bikes for Suzuiki for over 20 years and now produce the BMW G310 which seems to get the ideal reviews despite being BMW's bargain basement product.
A sensibly priced 961 would sell, no doubt about it.