I've never heard the latter except with people with some kind of lisp (like Sean Connery).
The former - "lawr and order" etc - is, at least in the UK, a feature of a number of regional accents to do with the linguistic phenomenon called "r intrusion" (see Wikipedia http://en.wikipedia.org/wiki/Linking_and_intrusive_R ).
It seems to have appeared as some kind of compensatory change following the decline of rhoticity in English, which left vowel-vowel transitions that are difficult to enunciate. As it's about 300 years old and grew up in the heartland of standard English (i.e. Received Pronunciation speakers), it may even be that since about a century ago, *not* using it is the peculiarity, and some linguists - (see Professor John Wells http://www.phon.ucl.ac.uk/home/wells/rphappened.htm ) consider it normal for RP English.
