Ultimate SEO URLs problem with amended link

[cclayton 0]

I am using the Ultimate URLs contribution and have a issue, I have amended the name of a product and therefore its link has changed from a to b, as seen below:

 

(a) domain.com/great-product-p-12.html

(B) domain.com/awesome-product-p-12.html

 

The problem is that I only want (B) domain to work and I want (a) to now go to a 410 page. The reason why I want this is because google is duplicating the page and therefore penalising me for duplicate content. Does anyone know how I can resolve this simply? I dont want to just 410 the page in htaccess as this is a much bigger issue across many products.

 

Any ideas?

 

Thanks, Chris