Ok, I promised so photos a while back... quite a while back actually. Rather than reviving an old thread, here is a new one to illustrate the different basket sizes and part numbers.
From the left:
1. LM "Triple" - 18g. P/N 700757.
This basket does not fit into the commercial Rancilio PF.
2. LM "Double" - 14g. P/N 300013.
This is the largest basket to fit into the commercial Rancilio PF.
3. Rancilio "Double" - 14g. Standard double that comes with Silvia.
4. Rancilio "Single" - 7g. Standard single that comes with Silvia.
5. Blind Basket. P/N 521902.
I am sure the standard baskets that come with Silvia are also sold by Coffeeparts but there are two part numbers per basket on their website and Id rather only quote what I know rather than what I think. If anyone can shed light on that it would be helpful.
Hope that helps someone.