Help shopping for Health and travel Insurance

Hi,
I am voluntarily leaving my employer and my last day is this Thursday. Next week I will go abroad to travel for 2.5 months before moving to the UK at the end of January. Overall, I will be in the US probably 2 weeks before going to the UK. In the UK I have a work visa and while there will be covered by the NHS.

However, I am not sure what to do with my coverage in the US as if I should purchase health insurance.
- My employer will offer Cobra but it is likely to cost around $600-$700/month which is IMHO very expensive
- Most of the time I will be outside the US therefore if I need to get treatment I would need the plan to reimburse me if something happens on the trip (i.e. break a leg in China or whatever)
- I just went to the doctor and I am in OK health
- I looked at various policies on MA Connector (which shows plans for Individuals) however its a bit ambigious.

I would assume the only scenario I would want to get treated in the US is if I really get sick on my trip (get a parasite or something) and would want treatment in the US. Therefore I am looking at coverage that will cover me in case I need to get treatment in the US because it other countries - China & Russia the treatment is inadequate.

I do not need prescription drugs or regular doctors visits during this period.

I also know companies sell 3rd party Travel insurance which does cover some costs of transport etc, but I believe most of these assume US health insurance / coverage as well.

Here is the link to the MA connector site with all the different plans. I think $700/month for 2 months is unreasonable but others can pitch in. I am 29 and living in Boston.

Thanks!