how to use str_replace with ampersands when enquing stylesheets?

I have some css enqued using the index.php? format. There are “&” signs between variables. In the plugin that produces the css, the code uses “&” between variables. putting “& amp;” however doesn’t work. It’s a mess… it seems the enque variable is being processed more than once and I don’t know where!

I just need the output to be “& amp;”

I have any idea on this type of problem, just let me know and I can show you the code, etc etc.

Thanks for your help!