Caol_ila,
I see what you mean about the proximity of the two dorsals - they are not as close on mine as on the L-003. L-017 seems to be more like it, I have a couple more pics and one shows the mouth quite well too. It is unfortunate that the Cat-e-log doesn't seem to conform with the Datz or some other sites species ID 100% . One good example is the L-232(Datz) L-239 Cat-e-log, I mention this just because I feel that there may be a difference on the L-003 also.

The pseudancistrus (?)

These poor pictures will be replaced once I get better ones but they show the bands on the clown and the facepaint, they also exhibit some extension on the tail fin which I'm sure will come back once the fish is in good health. It mentions somewhere that they can be terratorial and I have certainly observed this , I don't normally notice plecos being aggressive but I did notice it on these guys right away.
Pleco_breeder,
if by bulky you mean that they look a bit like tadpoles then yes they are. Bear in mind that these fish look like they have been through a bit so once they get a chance to recover and bulk up some I have full confidence that they will indeed be bulky. My one older clown/L-204 (?) looks pregnant and bloated - is that basically the normal way for them to look? When you mention that they may be one of many L numbers - does that mean they are mostly the same species ?
BTW - thanks for clearifying what to look for in sexing - especially the "when in good health" - seems like many of the fish on sale are not, so staring at them just makes you go insane
You are right about the light edging of the fins (on the pseudancistrus)- so I will assume that it is an L-017.
DeepFriedIctalurus,
common name for this one was: Lots of dots pleco
Thanks all