Boat Canopy help (camper /bimini renovations)

[Bfore]

Need some help folks.. Just purchased a 1998 wellcraft Martinique 3000. On the camper /Bimini top where it connects to the radar arch there is this rubber strip (see pics) it has mostly broken and dry rotted so I want to replace it. I can't seem to find this product anywhere online?
Not sure what it is called either!

Can anyone help? Thanks

 

[airshot]

Not sure of the name either but a custom canvass shop should be able to help you out.

 

[airdvr1227]

Any good canvas shop should be able to get that rubber channel.