Lend Lease if the Soviets lose Murmansk and Pacific access?

So, there have been many timelines/threads/what ifs where the Soviets have lost Murmansk, and there have been timelines/threads/what ifs where Japan joins the war against the Soviets and cuts off Pacific trade.

If both happen in Summer 1941, with otherwise relatively minor changes to the war (to include China and eventually Pearl Harbor), to what degree are the Soviets now faced with logistical issues? Can they be adequately supplied, or supply themselves effectively in this timeline? What portion of the Lend Lease can still be received and distributed?
 
There is Arkhangelsk, but that becomes more difficult if Murmansk is hostile.

Otherwise, the material would have to be transported either through the Med (which really requires Allied air and naval supremacy to guarantee), or overland (which requires decent rail access).
 
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