so as a LTT fan and huge consumer of their content I made a little chrome extension that will notify you when new items get published to the store.
This was initially my pet project for getting notified about Slovenian stores (yes that's why name is "Sledilnik Oglasov" in our native language), but with little modification it can now also notify you about LTT store items.
You can get extension at: https://chrome.google.com/webstore/detail/sledilnik-oglasov/pokbkddpjhbnlkcdfoekfhbepcclkejh
To get it working for LTT store you open up settings and paste in following link: https://www.lttstore.com/collections/all/?sort_by=created-descending
Then you will get notification badge each time new item appears.
I am glad I can help other fans of LTT getting their merchandise as soon as they release it.