First of all - let me congratulate you with moving to Latvia and I hope You will have wonderful time living here in our capital
And now to the case. As mates mentioned before, most popular shop for lada parts is located on Lienes iela 2, but you need to take two facts under consideration before going to that shop:
1. as mentioned before - you can't pay with credit card - cash only
2. the seller most likely don't speak in English, so I strongly recomend to take some Latvian speaking friend with you
Lot of parts for suspension like ball joints I buy online-shop on http://www.eparts.lv
- they oftenly have the best prices, but you have wait from 1-2 days till they bring parts form warehouse to office to Kārļa Ulmaņa gatve 123 where you can pick them up, other delivery options aviable as well.
Another great shop is Baltic autoparts (not an online shop) - http://www.bap.lv
, prices are a bit higher, but it's typical shop - so go and buy what you need. Located on Lielirbes iela 32a.
I recommend not to buy Russian made ball joint, because quality is really crappy IMHO
But for example you can't buy bushings for suspension arms and suspension arms itself in these two shops.
So the bottom line is - you need to know what you need, to know where to buy it
Some parts you can buy from hand, here in Selling/buying section.
We need to see some pictures of the car to know it's condition, than we could suggest what should be done about the car it and maybe suggest some places or people who could do the restoring.
And of course, WELCOME TO OUR LADA ENTHUSIAST SOCIETY