The over age players will probably end up being A-League guys cuz its in the middle of the MLS season and the UK pre-season. So I'm guessing Payne, Rufer and Kosta.
If Bell, Lewis, Stensness are all available then I don't think Rufer would add anything extra as an over age player. Maybe if Rojas gets backs from injury and shows some form for MV before end of the A-League he would be a possibility too.
I'd be surprised if Wood and Reid don't try and make themselves available, based on their history of wanting to turn out for the All Whites. With Covid and I assume no fans in the stands, opening ceremony, etc, I guess the Olympics might have lost some allure though.