Grateful you took time to take the photos. To be honest I think it looks better than the original seal and should save a few quid for others. Can't for the life of me see why that seal should cost £100 odd. Must be a lot of people in the supply chain to warrant that amount of money. However, like most things on a T25 if you look at something long enough you can often find a better or cheaper way to do a job.
For me it was all born out of neccessity but its become a habit and lead on to an even worse habit of skip-watching. When i got my first bug i didn't have two 5p's to rub together and kept it going on almost nothing. So far on the T25 I've hardwired my dashpod with stuff salvaged from a desktop PC, theres at least one panel repair that was originally a PC case. Various additional switches came from recycled electronic gadgets, my buddy seat was made out of hardboard and pine, stained to keep the weight down, and the rock n roll seat was an inspirational afternoon with a pile of steel donated by my neighbour, and the only seat I felt confident enough to put kids on. The tow bar also materialised in the same way. Then theres rollering.....
The moral is, if its expensive, consider if you can adapt something else or actually make it. Even if its not expensive to buy, sometimes theres just the thing you need lurking in yours or someone elses shed. Fortunately the type 1 & 2 lend themselves very well to innovative thinking (unlike modern cars) and really, its just an extension of what VW did in the design process.
Another that springs to mind, is the small scoop on the back of the tinware (facing gearbox) on a 1600 bug engine. Sometimes these are missing and a large rectangular tobacco tin does the job very well. Whats REALLY scary is when you read the fortune some owners pay for parts rather than really think a problem through.