what kind of meta-analysis do you want to do. I have done some work, and it is in the process of being published, what I have done though is done cluster analysis with multi-dimensional scaling on the kolb data.
But...you need a good statistical package to cope with the large dataset. Certain MDS protocols cap the sample at n=100
I would like to find some meta-analysis about standard population no matter in which country about learning styles. the problem is that i can found only work categories or students categories. I would like to access to a larger sample. like old people...
Yes, Kolb tends to be used a bit in education which is why you find only educational samples, but it is also used in HR / organisation psychology domains, so try to refine your search in that way, by searching journals specific to those domains.
Kolb is a copyrighted procedure so the datasets aren't often available from those domains. I haven't come across any gerontic samples though, but this would be interesting.