Okay, I’ve created an edited version of that graphic, designed for a .input-submit element of 188px. So…
1) edit that style to set the width to 188;
2) get the edited sprite (graphic) here: http://www.asgardforge.com/submit-miracle.png (use right-click/save)
That image needs to be renamed to submit.png, and placed in your RedBel theme’s /images folder. (First move the one that’s already there to another location, as a fall-back.) Let me know when that’s done.