Is there any possibility of you getting him a friend? Perhaps if he had a little doggy friend with him he might not get quite so upset when you are out at work? Two dogs could be twice as nice

Could you not look for another kennels or creshe in your area.
I would rather my dog had company all day and i would rather they came home covered in mud than be alone.
What about your neighbours could they not have him while you are working.
My neighbour used to come and sit with mine for a while if i was stuck and even took her to his house. It was company for them both.

Put an advert in the local shop for someone who would like a dog during the day if they are at home. You could maybe offer a small payment if you can.

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Grandma to Jinja Dog, Mum to Tilly the Cavalier, Tattycat, Moomy, Choo, Sonic, Niven Mc Twisp and Lawna the rabbits and 1 guinea,17 budgies, 4 Cockatiels, 8 Goldfish.

You could maybe try leaving food in a kong toy or a biscuit ball to keep him entertained during the day while you away. It might help to relieve any boredom he feels. My two love getting their kongs full of food (I swear they look forward to me leaving so they can get them!). I usually put in a piece of something that's hard to get out so that once they have most of it out, there is a piece that they need to work at for a while to try to get out (a large piece of freeze dried liver usually does the trick).