When hiring another firm I did a lot of prelim research on Avvo.com - they give you a good amount of detail and user reviews without having to create an account. It's easy to find the attorneys who are listed on there without having to use Avvo's system.
I still think the best way to find an attorney in a specific field is to ask other attorneys in any other field.
Failing that, contact your state bar association. For example, the CA bar association offers a list of certified lawyer referral services that will help you find a lawyer with the right expertise: http://www.calbar.ca.gov/Public/LawyerReferralServicesLRS.as...
Which is why I think it was necessary to be very direct about the issue
Next time try something like, "Yes yes yes, definitely find a specialist employment lawyer. Referrals and the state bar are a good way to do that, but make sure you end up with somebody who has spent a few years dealing directly with cases like this."
[1] http://english.ida.dk/why-join/core-benefits/counselling
Big Unions often employ or know top notch employment lawyers (it's not a focus for unions, but they still might work together on select cases), employment lawyers that can scare the acquiring company before negotiations begin :p
Which pointed me to http://lawyers.findlaw.com/lawyer/firm/employment-law-employ...
FindLaw is a Thompson Reuters business, so I trust it enough, and it came up with 43 results which it seems should be enough to find something adequate.
'Generic legal language' is not your problem, specific legal language applicable to this specific case is the problem and if $20 is the differentiating factor then you might as well quit the job or sign the contract anyway.