Are you still looking? I've got a very low profile 1 person tent in storage somewhere. I'll try and dig it out over the weekend and measure/weigh it to see whether it could work with your bike packing setup. It's a fair few years old so would very happily to do a good price on it. More recently I've been using the Alpkit Hunka Bivy and found it pretty good with a full on arctic style sleeping bag - surprisingly effective (even down to 1C!)
Are you still looking? I've got a very low profile 1 person tent in storage somewhere. I'll try and dig it out over the weekend and measure/weigh it to see whether it could work with your bike packing setup. It's a fair few years old so would very happily to do a good price on it. More recently I've been using the Alpkit Hunka Bivy and found it pretty good with a full on arctic style sleeping bag - surprisingly effective (even down to 1C!)