Where we can find companies/developers to build certain apps?

I tried the App request topic but never got a response, is there any company that works on such things? A user who can provide the device + money to make this happen?

Just to dim your hopes a bit down.
There are company(s) that do that, but I doubt you want to pay what they will ask you to pay (as in €2000 probably wont be enough, by far), developers aren’t cheap now a days, as it isn’t just creating the app, it is also maintaining it you’ll probably have to either live that the app can break, or pay the said company monthly a pay rate.
You have a bigger chance for asking the company of the device itself to create an app.

I contacted a company which made Helltun app, but they refusing to deal with individuals, can you share with me some please.

What app do you want or need?
Perhaps i can help?

This is a product i am interested in: