If you're a senior level developer (ie: if you've been doing development more than 7+ years), then you're in luck. Companies usually recognize senior level developers can migrate to a related technology stack without too much of a loss, and the skills of being a senior developer are more soft-skills than particular technical areas. Recruiters generally won't know how to sell you in this regard, but with a bit of networking, you should be able to find you a bridge position into your new technology stack. You are going to be expected to hit the ground running, which will make the first few months of that job really exciting, but it should be entirely possible.

A good place to look is in consulting companies, like my own Webonise Lab. Consulting companies will often hire experienced people to become generalists with broad skill sets, and will often take a specialist and give them an opportunity to train up through the company's open source projects and the like.