The league champions stormed into a 3-0 first half lead at AFC Stubbington before the hosts replied just before the interval.
Meon’s stand-in keeper, Adam Beckett, was sent off after the restart for dissent - meaning midfielder Bill Cook had to don the gloves.
Stubbington, who had lost 2-0 and 3-0 to Meon in MSL games in 2020/21, pulled another goal back and equalised 15 minutes from time.
There was a dramatic finale with Meon awarded a late spot-kick for handball and Whitcombe coolly converting his second goal.
We went 3-0 up through Jagjit Singh, an OG from a corner supplied by Dan Edwards and Bayley whitcombe. They then scored before half time 1-3 HT.
Meon will now face league runners-up Mob Albion in the final at Front Lawn on June 19 (3pm).
Darren Ferguson hit a hat-trick as Mob caned Burrfields 5-1 in their semi-final.
Top scorer Harry Potter and Cam Palin were also on target.
![Chris Moorhouse](https://www.thestar.co.uk/webimg/b25lY21zOjdkZTNjOGJiLWY2NDMtNDgxZi1hMjY0LTYxNWM3NjI1NWFlZTpjNmUxYzZjMy1jOGUxLTRhM2YtOWYzOS00MDc3YmY3YWM5NDc=.jpg?crop=3:2&width=800)
![Kevin Shipp](https://www.thestar.co.uk/webimg/b25lY21zOjA3Mjc1NTU5LWNhYjMtNGM0My04YTM3LWJkZjcyZmFmYTg2OToyYTA2OTgzMy0wZDU3LTRlZTQtYjc3OS0wZDA1ZWNlNTRiMWY=.jpg?crop=3:2&width=800)
![Kevin Shipp](https://www.thestar.co.uk/webimg/b25lY21zOjMzNzdhZjdkLWNmMDAtNGJmZi1iMDNkLTgyZTU4MGNjODA3YToxN2JlNzVkYy1jYTUwLTQwOTYtYjY5My01MmJmZDJjOGUxYjY=.jpg?crop=3:2&width=800)
![Kevin Shipp](https://www.thestar.co.uk/webimg/b25lY21zOmI5M2IwNWU1LWYyZTYtNDc4Yy05MTc0LWVlM2Q3NDEzMDUzYToxY2VmNWQ4YS0zZmU0LTQxNTgtOTczMC1jMzNjYzEzYmM0ZGQ=.jpg?crop=3:2&width=800)