Another alternative is amber malt which is quite easy to come by here. Amber & Biscuit taste very similar in my experience, I.E., 'biscuity'
You shouldn't have any bother finding an online shop that sells these but if you do let us know.
I'm not entirely sure about this, but I think if you're toasting your malt at home it must be done whole, which would require you to have your own grain mill.