I'm going IMS for basket (b662th32m) and screen (sm200im), possibly silicon group gasket.
Tampers are a bit harder - was looking at torr, but their site seems stuffed for all payment types.
IMS do a matching 54.4 which I have just found supplier for in the uk
Heavy tamper do a 15.5 from czech, IMS say 15.4 so sticking to that.
There is a custom tamper maker on etsy - alperwood that looks nice, good feedback. But pricey with shipping.
There are some other options like Pullman, but gets steep quick...
In case anyone finds it useful - apologies for duplication:
Generally LSM has some variance in basket size between 53 for a single and 54.5 for a double depening on manufacturer.
IMS has a recommended tamper size of 54/54.4. From reading through feedback on the Alex Leva accesories thread (Vostok uses the same group design in theory, but not cartridge heated). From recommendations on the same thread - deeper basket with a bit of a gap between the shower screen/circlip is recommended. There were several comments about the stock (Leva) screen flow being a little "ragged". Obviously all of above may be irrelevant, but i thought doesnt harm to plan in advance as some of this stuff has a bit of a lead time.
single basket - B662TH26M
double basket - B662TH32M
screen - sm200im (sm200nt for the posh nano version)
54.4 inox steel tamper base - BAAC54.4F
I emailed IMS who gave me a contact at the UK distributor and who in turn pointed me to:
Give it to the beans / sales@giveitthebeans.co.uk /Adrian
Tamper base is 14.70 + VAT (and postage), and will a few weeks on order from Italy. The handles all mention M10 in the description so i guess this is the thread size which i think is the same as a Motta (TBC - based on a google search).
Im also getting a handle, basket and shower screen at the same time as decent pricing/reduced total cost of postage.
Total cost of £55.49 + VAT + P&P
seems reasonable to me
in parallel - Paulo just posted more pics of the first test machine on coffeetime!