Well if you have old parts that wouldn't hurt to change, the source and money for parts, sure :)
It's usually wiser to order everything you need for the moment or near future. That way you will save in shipping fees, might even get free shipping.
I'm having troubles with my fork, too. There are some cracks, shot bearings etc.
The front seems to be kind of a weak link on these mopeds. This based on my own limited experience and 'stuff I've read' xD
Good thing there is this web store that have new forks, if my memory serves me. They have practically everything you could possibly need for the 210..