Not sure if Amazon US's site is an option for you, but if so, I highly recommend the Echobox Finder,
currently available for $10 on Amazon.com. They've been my sleeping IEMs since I got them, they're extremely comfortable and the shells fit deep enough into my ear that I can lay on my side and they don't put any pressure on my ears at all. I've also been using them a lot this winter, because they are really comfortable for wearing under winter hats pulled down over my ears.
Only warning I'll give is that the filters you can use to alter the tuning are extremely fragile. They're not at risk of falling apart as long as they're attached to the IEMs themselves, but they are extremely prone to falling apart if you're handling them on their own. They come with the "bass" filters installed, so if anybody buys these and you listen to them out of the box and think the bass levels sound good, I'd suggest never removing the bass filters. One of my bass filters fell apart when I just wanted to quickly audition the other filters. I also reached out to the company via email for a replacement because there's allegedly a 3 year warranty, but I never heard back from them.
Overall sound is pretty balanced on the whole. With the "reference" filters they kind of remind me of the Tin T2 but without the sub bass roll-off, and more depth in the sound stage.