I think all legit insurers will want a survey for an older boat. On the positive side, insurance surveys aren't too harsh from what I've seen. Besides, it can be handy to have a second opinion on the seaworthiness of your vessel.
We just insured our new to us boat via Pantaenius. The survey identified a handful of items that need attention. The insurer wants these fixed, but we agreed to do these over time in order of priority and advise accordingly. Obviously safety
affecting items will be fixed asap.
As an alternative, you could go with Edward William Marine
insurance, but you may want to get your mate to do some reseaech first.