Are there any blockchain explorers that provide raw Tx data and block headers? I've looked at some of the more popular blockchain explorers, but none of them seem to provide the feature I'm looking for. I'd like to find a blockchain explorer that allows you to see raw Tx data and raw block headers. The explorer's I've seen parse the raw data and present it in a more human readable format. Are there any that provide the raw data?

Thank you!
You can get this info from blockchain.info, by simply adding ?format=hexto the end of the relevant URL. 

For example, here is a recent block (height 509,244):

https://blockchain.info/block/0000000000000000000635bda771916ca727db53fea5441508f7161386e066be

And here is the raw data for that block, in hex:

https://blockchain.info/block/0000000000000000000635bda771916ca727db53fea5441508f7161386e066be?format=hex

(Note that you will need to parse the block header out of this data, as that URL will dump the raw data for the entire block)

Similarly, here is a transaction from that block:

https://blockchain.info/tx/74d350ca44c324f4643274b98801f9a023b2b8b72e8e895879fd9070a68f7f1f

And here is the raw data from that transaction, in hex

https://blockchain.info/tx/74d350ca44c324f4643274b98801f9a023b2b8b72e8e895879fd9070a68f7f1f?format=hex