I seldomly frequent the loan section so i have no idear how this would work, and i have never used tron in the past, but i did load my mobile wallet with 1.7895599 LTC a while ago, and i haven't spent these funds (yet) so i'd be willing to loan them out to you... I know it isn't exactly 2.1 LTC, but your OP talked about "some 2.1 Ltc"
I'd say ~1% intrest + transaction fees for a 5 day loan.
So ~1.789 LTC (can be a little more or a little less depending on the tx fees) would have a repayment of 1.81 LTC in 5 days.
Since tron seems to be rather volatile, and LTC seems to be volatile aswell (at least, from my perspective), i'd request 150% collateral for the principal + intrest, so the collateral should be enough to cover 2,715 LTC
https://www.coingecko.com/nl/coins/litecoin says 1 LTC = 0,00477895 BTC
2.715 LTC * 0.00477895 BTC/LTC = 0,01297485 BTC
https://www.coingecko.com/nl/coins/tron says 1 TRX = 0,00000180 BTC
0,01297485 BTC / 0,0000018 BTC/TRX = 7209 TRX
If you want to use an escrow, that's fine by me (as long as it's a trusted bitcointalk escrow). You do pay the fees.
If you think this offer is absurd, do realise i don't frequent the loan section all that often, so i've built in some safeguards to protect me from the sale-disguised-as-a-loan trick, and nothing you say will change my mind... It's kind of a take it or leave it deal.
EDIT: more of a PS, since i'm not acustomed to the inner workings of the loan section, this offer will only be valid for 24 hours, and if somebody points out any flaws in my logic that makes me vulnerable to getting scammed, i also have to right to withdraw the offer...