How to display extra attribute data (e.g., regular price, discounted price, etc)

The pro form has two placeholder attributes:

  • %%description%%
  • %%coupon_response%%

I’d like to access other attributes, such as the original pre-discount price held in the “ra” attibute. It would also be nice to access arbitrary custom attributes, such as

data-msg-to-user="One-time charge"

Looking through the source code, this doesn’t seem possible unless you add it in a future release.

So in the meantime, is there a way to apply a filter to the %%description%% and %%coupon_response%% placeholders so that I can modify their HTML output formatting via regex?