I'd take anything that people give approx times of with a pinch of salt. There isn't one broker than could have sold Setanta as a new policy in March as they werent accepting new business.
Your broker is able to pull your cert from their website as it is was previously generated and therefore available to download. However Setanta policies are not technically cancelled until they give the necessary letter confirming cancellation. Therefore at this point in time your cancellation no claims bonus is unlikely to have already been generated and this therefore unavailable.
Generally a new insurer following their normal procedure would not accept a no claims bonus dated from your last renewal date as it doesnt state any claims you could have had in the intervening period.
I mean unpaid staff because if a company goes into liquidation its likely their staff havent been paid either. So they won't be particularly helpful to the barrage of brokers calling them.
Just a note on this re no claims bonus cert. I have a competitive quote online with another company and they tell me if I take out my insurance online with them I won't need a cert as it is a paperless transaction and I spoke to them on the phone and all calls are recorded so it sounds like I should be able to go ahead and buy this policy. May be of use to somebody else.