They also have England Under-19 international Jamie Benning, who is on Surrey's books. Teddington have contested six major finals since 1989, three in the Challenge Trophy and three in the National Knockout, winning five of them.
Left-arm spinner Simon Weale, 34, has appeared in all six.
Sunday's final could be Weale's farewell as he has recently taken up a senior teaching post at Reigate Grammar School.
THE LINE-UPS
Teddington (from): T Harrison (capt), A Mawson, A Tarrant, J Attfield, R Jones, M Crawley, E Hill (wkt), A Whittall, C Pitcher, S Weale, P Dancy, B Duncan.
High Wycombe (from): J Harrison (capt), M Eyles, D Taylor, G Pooley, J Benning, M Wright, P Sawyer, A Cole, T Russell (wkt), P Woodroffe, R Thompson, M Morgan.
Venue: The Oval, Sunday, 50 overs per side. 11am start, admission free.