I would reiterate the need for getting quotes from both Chinese and local suppliers. I would also suggest you consider a few quotes China to get a good comparison. Like BeautyScientist said, sometimes it's cheaper to stay local (especially with currency fluctuations and the hassle of transporting). However as MisterB said, Asia is often cheaper.
Contacts are the tricky issue when you are dealing with China. They are not that easy to find. I am in China and I meet suppliers all the time asking the opposite question. I am still trying to work out why it doesn't work. I think it is because Alibaba, MadeInChina and TardeKey dominate the Google search results. The smaller guys who can help you just can't get the ranking.
Thus we have the question for Ador_pets. A lot of the suppliers that I am guessing you would be after can be found on Alibaba. They have a site hosted by Alibaba. The thing is you can't search for them by the description of your product. You do it by describing the methods used to make your products: injection moulding, machining, assembly etc. Type that in to the search and you will have an excess of hits. The issue is that they don't do a very good job of explaining themselves. They are are more trades people than advertisers.
The end effect is that they are difficult to gauge. Therefore, you need to contact them and get to know them. This is why you hear people saying that you need to visit.
It looks like you have some good offers there for contacts. I suggest you try them.
If that doesn't work then I would suggest you send off a well documented RFQ to a few of the suppliers that you have found on Alibaba. You can get a good feel for a company based upon how they respond. If you find some suppliers that show potential, then you might want to visit them first; probably a good idea.
Alternatively, you can get someone in China to talk to them for you. There are few companies over there that will do that for you. They can check out quality methods and capability. They can act as proxy for you too.
Once your proxy screens the first lot you select you can then go over and meet with the factories that were found to be best.
Good luck with it all, Hungrytiger86.