BC shipping options WORKAROUND

Your best bet would probably to set a price for those products as $0.00 or 0 in whatever currency your site uses.  Then, on your checkout page you can use some jQuery/javascript to sense if there are any products in the cart that have $0.00 and you can then hide the checkout button and show the get quote button which will force the user to get a quote instead.  Then, you client will receive a notification of a quote that's been generated and they can update it to include the custom shipping cost manually in the BC Admin and resend it as an invoice for that customer.

Here's a thread where I give an example-- there are a few good examples on how to do this on the forum. 

http://forums.adobe.com/message/5571418#5571418

Drop me a line, I'm shipped in tones with a customer shipping caldulator for BC checkout, volume and any shipper you want, DHL, Fedex, EMS, etc.

BCMan - I sure would appreciate an assist. I just got bit by the issue where I can't get a FedEx LTL price. My client wants no part of having the customer request a quote so I'm in a real bind. Thanks!

Sure thing, drop me a PM and I can show you some examples. I don't want to publicly post the URL as they as they are live client sites and I don't want hundreds of people testing on them