Look at Hormann Rubber botton seals, similar profile.
https://www.garagedoorpartsuk.co.uk/sectional-door-parts?product_id=1908[/URL]
Also Formseal up at Stone might be able to help, they do seals for various doors.
This firm can retyre the 613 wheels, £70 plus vat.
D B Keighley Machinery Ltd, Vickers place, Stanningley, Leeds, LS28 6LZ.
Not allow to post a link. :(