Check out Steve's review on the GunDog Supply web site about the TEK 1.5 collars. There are also some reviews from people that are using the collars.
https://www.gundogsupply.com/sportdog-tek-1-5lt.html
I know that SportDog has some issues with their early models of the TEK but I haven't heard of any issues lately. Maybe they got those resolved with the TEK 1.5.
If you google "Garmin 550 plus holster" you will get quite a few options. Or take a look at these options from Gun Dog Supply.
https://www.gundogsupply.com/garmin-pro-holsters.html
The Alpha has a lot of features, many that you will probably never use. The 550 Plus is simplier and would likely do everything you need. The only downside I see is the larger transmitter. Have you looked at the SportDog TEK collars?
Are you still located in Rapid City? There is a Weimaraner breeder in SW Nebraska that you might call. I personally know nothing about this breeder, don't even know if tthey are still in business. But you might try giving them a call...
You probably couldn't find a worse place in South Dakota for bird hunting. Unless you want to drive 100+ miles east or north of the Deadwood/Lead area. Also, that time of year in that area you could have a fair amount of snow.
https://www.crispiusa.com/upland-pro?size=8&width=d&color=brown
Let me know how they work out. I may may need a new pair of boots this fall. I've got hard to fit "old feet". Glad to see they come in a EE width.