Unfortunately providers cannot reply to threads like this, at least in regards to their own company, you can check out the offers forum or contact providers directly to find out if they offer the services that you require.
It is not about the replies from web hosts. Even they were allowed to respond you'd still need to clarify many things such as server hardware, Os and software environment, pricing, service model and many other things It is much better to go to Offers section to review profiles of some companies (I would go for at least 10 dedicated hosts) and then to send them requests or to call them.
This is a serious business and you'll need to comply with many things, including to create your own TOS that compare with those of your provider.
You say managed VPS, what level of management are we talking about here, OS full level or full everything management or something else? Provide more details of what you need so we can try to point you to some providers that will do what you need.
If you are looking for a company to mange your servers then I recommend you
from my experience they are really one of the best companies out their, they are VERY polite and VERY professional.
And they always give you recommendations for making your server better and always make sure that your problem have been solved before closing down "ANY" ticket, they are not like these other companies who think that as long as they have replied to the ticket they can move it to the "closed" section
trust me .. i'm only with them for 2 weeks (after having the worst experience with some other company) and i'm already a BIG fan