Thailand has it all now or at least Bangkok.
Proper whisky or whiskey
Shave cream
Antiperspirant deodorant
Immersion coil π
3-4 boxer short, 3 shorts, four shirts.
A bathing suit if you have one.
A quality, (waist), thin money belt.
If English, brown diabetic sauce
If English - stilton cheese.
If English, doubt you'll need large size condom but maybe ?? bring from home.
If English do yourself a favor and wear proper shirt not a T or especially team jersey.
Something for upset stomach you know and trust
Buy a mid phone here, anything else you need. It's all here now.
Don't bring sunscreen. Buy Japanese or Korean here. Much better for sun and skin.
Do not wear cargo shorts, singlets or bath flip flops anywhere*