Hi, HoC.. I can throuroughly relate to what you are saying: my DS (now 5.10) has similar difficulties: dribbling, low facial muscle tone, couldn't blow bubbles ( still can't, although his speech is clearer now). He learn't a few makaton signs, and it helped him get his point over and feel less frustrated.
DS was in a private nursery to start with which was great, very parent friendly, child was breakfasted, lunched, suppered, returned spotless in clean clothes, with brushed hair 'n teeth. they even provided nappies and washed the clothes. Brillliant! DS loved it too, even better, and they loved him.
BUT, our Portage worker recommended he should go to the local surestart becausse they are totally wired in to OT provision, physios, SALT, etc they were a great support during the statementing process, and in the transition to school. They set out targets for him, and we had regular meetings, which the private nursery didn't do. ( All this was very useful when going for a statement) He came back every day filthy but happy, and his development progressed leaps and bounds.
In the end, because the waiting list was so long, DS's portage worker had a word with the Sure start head to get DS a place, and we only got a couple of days a week, so he ended up going to both nurseries. I was worried how he'd handle it, but he took it all in his stride - even told me when I started driving to the wrong one one day!
Our experience was that both were good, in very different ways, but DS got a hell of a lot more out of the surestart nursery in terms of his development.
Of course each nursery is different, but I would urge you to check out the sure start, and ( if you like it) even if you can't get all the days you want, consider taking just a day or two to get into their system. Once we were in, we got extra days when they came up.
And if you need someone to give them a ring to see if you can get a place don't be shy to ask your salt, GP, physio, health visitor, whoever to help pull some strings