As you said, all going to end up coming from overseas and prices are usually pretty consistent, but a lot of people use Hermy's and they do have great customer service.
OEM Triumph Genuine Motorcycle Parts | HERMYS TRIUMPH eSTORE
Glad to see that you're planning on DIY. For all the trouble of making a video of the process I'm surprised how little interest there is in the topic. A post on what oil to use will go on forever. All I can think of is that few of us running the 2.5s do our own work. When I had an '11 Roadster there was so much wisdom being shared from other members who weren't afraid to get their hands dirty. Back then I came to the site knowing next to nothing and have learned from better minds along the way. It's all doable once you start.
I've been helping my dad work on his Harley the last couple days.(drive belt and swing arm bearings) I was just telling him today, there must not be a lot of people that work on their goldwings because someone asked in a group if it's important to check the valves every 24k as recommended. 98% of the people said don't waste your money paying the dealer because the valves never change. How the hell do they know if they never change if they never check them
Its $5 for feelers and the procedure on the wing is simple, even adjusting them isn't that bad of a job( compared to the Rocket). Just blows my mind how many ppl will risk damaging their bikes by never checking it because they don't wanna learn to do it or pay someone to do it. Seems like it could lead to a much costlier repair down the road.
Back when I had my 77 goldwing there was a forum (probably 18 years ago) that had guys on there that could tell you what a random bolt you asked about went to, what size socket to use, the length, thread pitch, grade and torque it required. These days the forums are dead. Seems there just isnt that much interest in doing your own work. I've always been too broke to pay people, so I just do it.
Between having a service manaul, you tube, forums, chat GPT and google, you can do just about any job you can think of on a bike or car. Spend the money you were going to give someone for labor and buy tools instead. I get it for the people that don't have a space, but that isn't the majority of people and if thats the case than you gotta accept having someone do it for you is part of the cost to ride.
There are a lot of people in this forum that take the time and effort to help as much as possible and I'm grateful for it.