Some more basic cartouche style shields (though the list on page 1 isn't, IIRC, finished being implemented) as Jim is doing shield stuff this afternoon:
ausm*, ausa*, ausxxxb, ausxxxc, ausr - green background, yellow text, prefix
finst, frolv - white background, black text, no prefix
gbnb, nirb, irlr - white background, black text, prefix
fraxxxd - yellow background, black text, prefix (includes overseas stuff like reu, glp, guf, myt, mtq)
fraxxxm, fracort - cyan background, white text, prefix
ukrm - blue background, white text, prefix
espxx - orange background, white text, prefix with dash** (except for espct)
espn, espct - red background, white text, prefix with dash** (espn already done, just letting you know its the same template)
That'll be enough for now.
*some states use an National Highway sign with an alphanumeric number, but we'll leave that for now.
**espn has a dash between prefix and number automatically inserted. espxx and espa (which has shields) also have a dash between prefix and number.