It is certainly possible to buy these compounds from many commercial sources - the issue may be what you consider reasonable price versus what the sellers charge!
@Tausif Alam, Thank you for your answer but I did not find this product in Sigma. The issue of reasonable price is secondary and can be reconsidered If I can get the product.
@Rit Bahadur Gurung, The products given in this link are all alpha-linked NDP-Sugars not beta-linked sugar.
My concern is to get UDP/TDP-beta-D-glucose in particular.