Styling Credit Card Tokenizer form fields

We are using the Card Tokenizer on our site and the fields don't quite match those of the outer form, primarily font sizing. It would also be nice to be able to specify 'pretty' format for the credit card number:

4111 1111 1111 1111

instead of the default:

4111111111111111

I know Billsby tokenizer wraps Spreedly's tokenizer, is it possible to expose the set* (setNumberFormat, setStyle, etc.) methods of spreedly?

Thanks
Alun